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natali 33 [55]
3 years ago
6

Plz, help me I will give you a brainlist and Extra points. If you help me.

Mathematics
1 answer:
stiv31 [10]3 years ago
8 0

Answer:

B) (4/9 x 20)-3

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Simplify 64^-1/3<br> A. -4<br> B. -1/4<br> C. 1/4<br> D. 4
shepuryov [24]

Remember, the numerator of an exponenent represents the root. As well, a negative exponent means to take the reciprocal of the positive exponent (a^{-b} = \frac{1}{a^{b}}.

So, 64^{-1/3} is equal to \sqrt[3]{64^{-1}} which is 1/4, because 1/4*1/4*1/4 is 1/64 (1/64 cubed root is 1/4).

For example, a^{b/c} = \sqrt[c]{b^{b}}

The answer is c.

5 0
3 years ago
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What is the value of x?
Nesterboy [21]
This is a special 60-30-90 triangle, and the angle measure of x is 4 \sqrt{3} .
8 0
4 years ago
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What is the value of s in the equation 3r=10+5s when r =10
schepotkina [342]

Answer:

s = 4

Step-by-step explanation:

Given

3r = 10 + 5s ← substitute r = 10

3 × 10 = 10 + 5s

30 = 10 + 5s ( subtract 10 from both sides )

20 = 5s ( divide both sides by 5 )

4 = s

7 0
4 years ago
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20 points to whoever answers this first
taurus [48]
Answer: 
71˚

Explanation:
To find the <em>mean</em> of a sum of numbers, you add all the numbers together, and then divide by how many numbers there are. 
71 + 72 + 68 + 67 + 74 + 72 + 73 = 497
497 ÷ 7 = 71
4 0
4 years ago
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An equation is shown.<br> 18+ 5(2x + 5) = 12<br> Solve the equation for x.
Sloan [31]

Answer:

Step-by-step explanation:

18+10x+25=12

18+25+10x=12

43+10x=12

43-43+10x=12-43

10x= -31

x= -31/10

x= -3 1/10

              This is the correct answer

4 0
4 years ago
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